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Active · #77 by victimsRansomware group

Abyss

As of Oct 19, 2026, Abyss has listed 89 confirmed victims on its leak site since Mar 22, 2023, 0.3% of all victims tracked by Brandefense. Its most targeted country is United States (71.9% of its victims) and its most targeted sector is Consulting.

Abyss (also known as Abyss Locker) is a ransomware operation first identified in March 2023, derived from the Babuk source code, that targets Windows and Linux/VMware ESXi systems using double-extortion tactics across healthcare, manufacturing, finance, and technology sectors, predominantly in North America.

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Confirmed Victims
89
Rank By Victims
#77
Last Leak-Site Post
Aug 26, 2026
Top Country
United States
Top Sector
Consulting

Victims Posted Per Month.

Abyss confirmed victims per month
MonthConfirmed victims
November 20250
December 20251
January 20261
February 20261
March 20260
April 20260
May 20261
June 20262
July 20260
August 20261
September 20260
October 2026 (month in progress)0
Updated continuously · figures as of Oct 19, 2026

Latest Abyss Victims.

Search all 89 →
Latest confirmed leak-site victims claimed by Abyss
VictimCountryIndustryData claimedPosted
MEMSIC
memsic.com
CNChinaManufacturingNot stated
School Facility Consultants
s-f-c.org
USUnited StatesConsulting1.3 TB
landkreis-limburg-weilburg.de
landkreis-limburg-weilburg.de
DEGermanyGovernment and Public Sector132 GB
technic.com
technic.com
USUnited StatesTechnologyNot stated
thinlinetech.com
thinlinetech.com
USUnited StatesTechnology29 GB
sitoy.com
sitoy.com
HKHong KongRetail1.7 TB

How They Operate.

Abyss's threat actor profile lists 3 ATT&CK techniques, 2 malware and tools, with its targets and related actors.

TTPs, CVEs and malware →

Who Abyss Targets.

Sectors

  1. Consulting1011.2%
  2. Manufacturing910.1%
  3. Technology910.1%
  4. Healthcare66.7%
  5. Construction55.6%

Countries

  1. USUnited States6471.9%
  2. CACanada44.5%
  3. CHSwitzerland33.4%
  4. GBUnited Kingdom33.4%
  5. DEGermany22.2%
Shares are of this group's confirmed victims.

History.


  1. First confirmed victim listed on its leak site

  2. First seen in Brandefense data

  3. Busiest month on record: 10 confirmed victims

  4. Most recent leak-site post

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Figures as of Oct 19, 2026. Confirmed leak-site claims collected by Brandefense technologies and validated by Brandefense analysts.

Listed on a leak site means a ransomware group has claimed the company; it is not a confirmed breach. To request a correction or removal, contact Brandefense.